Intelligent head-mounted device

Abstract

The invention discloses an intelligent head-mounted device, and relates to the technical field of intelligent head-mounted devices, the intelligent head-mounted device comprises a shell, an eye movement tracking module and a lens assembly, and the inner wall of the shell is provided with a first accommodating groove with a first opening and a second accommodating groove with a second opening; the eye movement tracking module comprises a camera and a light-emitting part, the camera is arranged in the first containing groove, and the light-emitting part is arranged in the second containing groove, so that the size of the VR system is prevented from being increased. Light emitted by the light-emitting part can be emitted to human eyes through the second opening; light emitted by the light-emitting part can be reflected by human eyes and then is emitted to the camera through the first opening, and the camera can receive light reflected by the human eyes; according to the eye movement tracking module, the lens assembly can allow the infrared light to pass through and can also block the visible light to pass through, the lens assembly covers the first opening and the second opening, the eye movement tracking module is prevented from being seen by a user, and the use experience of the user is improved.

Description

Technical Field

[0001] This invention relates to the field of smart head-mounted devices, and particularly to a smart head-mounted device. Background Technology

[0002] In VR (Virtual Reality) glasses, to enhance the immersive experience, eye-tracking cameras and infrared light strips are typically added to the VR module. When worn, the light strip emits near-infrared light towards the user's eyes. The user's eyes reflect a portion of this light, which is then received by the camera to determine the position of the user's eyes. Based on the position of the user's eyes, the VR display is rendered in real time to improve the user experience.

[0003] However, existing eye-tracking modules are generally designed on the outside of the VR optical engine (near the eye), which increases the size of the VR system. Alternatively, the camera can be designed between the lens and the screen, and the light strip of the eye-tracking module can be placed on the outside of the VR system (near the eye). This solution has certain advantages in terms of size, but there is a problem that the camera can be seen by the user, and the placement of the camera is more important. Summary of the Invention

[0004] The main objective of this invention is to propose an intelligent head-mounted device that aims to solve the technical problem of making the eye-tracking module difficult for users to see without increasing the size of the VR system.

[0005] To achieve the above objectives, the present invention proposes an intelligent head-mounted device, comprising: The outer casing has a first receiving groove with a first opening and a second receiving groove with a second opening on its inner wall; An eye-tracking module includes a camera and a light-emitting element. The light-emitting element emits infrared light. The camera is disposed in a first receiving slot, and the light-emitting element is disposed in a second receiving slot. The infrared light emitted by the light-emitting element can be directed towards a human eye through a second opening. The infrared light emitted by the light-emitting element can be reflected by the human eye and then directed towards the camera through the first opening. The camera can receive the infrared light reflected by the human eye. A lens assembly that allows infrared light to pass through and blocks visible light from passing through, the lens assembly covering the first opening and the second opening.

[0006] In one embodiment, the lens assembly includes a first lens and a second lens, the first lens sealing and covering the first opening, and the second lens sealing and covering the second opening.

[0007] In one embodiment, the lens assembly further includes a first adhesive layer, which is disposed around the periphery of the first lens, and the side of the first adhesive layer away from the first lens is connected to the housing. And / or, the lens assembly further includes a second adhesive layer, which is disposed on the outer side of the second lens, and the side of the second adhesive layer away from the second lens is connected to the housing.

[0008] In one embodiment, the first lens is embedded in the first opening; And / or, the second lens is embedded in the second opening.

[0009] In one embodiment, the wavelength range of light that the first lens and the second lens can transmit is 800nm-850nm.

[0010] In one embodiment, the light-emitting element is a side-emitting element, and the light-emitting side of the side-emitting element is arranged facing the human eye; In one embodiment, the smart head-mounted device further includes an optical lens disposed within the housing, the optical lens being located at the end of the housing away from the screen, and the eye-tracking module being located on the side of the optical lens away from the human eye; the optical lens includes a first surface and a second surface disposed opposite to each other, the first surface being a concave surface and the second surface being a convex surface; If we define the ratio of the radius of curvature of the first surface to the radius of curvature of the second surface as 'a', then 0.7 ≤ a ≤ 1.3. And / or, if the thickness ratio of the optical lens is defined as b, then b < 2; And / or, the optical lens includes a central portion and an outer edge portion surrounding the central portion, wherein the distance from the inner ring of the outer edge portion to the outer edge portion along the radial direction of the optical lens is one-third of the radius of the optical lens; the thickness ratio of the outer edge portion is defined as c, then c < 1.5.

[0011] In one embodiment, the first surface includes a first central region and a first peripheral region surrounding the first central region. The arc length from the center of the first surface on a plane passing through the axis of the optical lens to the inner circle of the first peripheral region is defined as d1, and the arc length from the center of the first surface on a plane passing through the axis of the optical lens to the edge of the first surface is defined as d2. Then d1 = d2 * 2 / 3, and the difference between the maximum and minimum slopes of the first peripheral region is d3. The second surface includes a second central region and a second peripheral region surrounding the second central region. The arc length from the center of the second surface on a plane passing through the axis of the optical lens to the inner circle of the second peripheral region is defined as e1, and the arc length from the center of the second surface on a plane passing through the axis of the optical lens to the edge of the second surface is defined as e2. Then e1 = e2 * 2 / 3, and the difference between the maximum and minimum slopes of the second peripheral region is e3; and |d3 - e3| < 0.4.

[0012] In one embodiment, there are multiple cameras, which are spaced apart along the circumference of the housing, and the first receiving slot is the same number as the number of cameras and is provided in a one-to-one correspondence. And / or, the number of light-emitting elements is multiple, and the multiple light-emitting elements are arranged at intervals along the circumference of the outer shell, and the number of the second receiving slots is the same as the number of light-emitting elements and they are arranged in a one-to-one correspondence.

[0013] In one embodiment, the eye-tracking module is located at the end of the housing closest to the human eye.

[0014] In one embodiment, the inner wall of the housing is provided with an infrared reflective film, which can reflect infrared light reflected by the human eye toward the camera.

[0015] In one embodiment, the outer wall of the housing is provided with a first inlet and outlet communicating with the first receiving slot. The smart head-mounted device also includes a first protective cover, which is disposed on the outside of the housing and detachably connected to the housing, so that the first protective cover can cover or expose the first inlet and outlet. And / or, The outer wall of the housing is also provided with a second inlet and outlet that communicates with the second receiving slot. The smart head-mounted device also includes a second protective cover, which is disposed on the outside of the housing and detachably connected to the housing, so that the second protective cover can cover or expose the second inlet and outlet.

[0016] The technical solution of this invention provides a first receiving slot with a first opening and a second receiving slot with a second opening on the inner wall of the housing. This allows the camera of the eye-tracking module to be positioned in the first receiving slot, and the light-emitting element of the eye-tracking module to be positioned in the second receiving slot. This avoids increasing the size of the VR system. The light-emitting element emits infrared light, which is reflected by the human eye and then directed towards the camera for reception. By using a lens assembly to cover the first and second openings, and ensuring that the lens assembly allows infrared light to pass through but not visible light, the light emitted from the light-emitting element can pass smoothly through the lens assembly and reach the human eye, and that the camera can successfully receive the infrared light reflected from the human eye, thus guaranteeing the normal operation of the eye-tracking module. Furthermore, because the lens assembly cannot transmit visible light, visible light cannot pass through it to reach the camera and the light-emitting element, nor can it be reflected after reaching the camera and the light-emitting element and thus reach the human eye for viewing. Therefore, by adding a lens assembly, the eye-tracking module is prevented from being seen by the user, improving the user experience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a partial structural schematic diagram of an embodiment of the intelligent head-mounted device provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure at point AA; Figure 3 This is a schematic diagram of the optical path between the intelligent head-mounted device and the human eye provided by the present invention; Figure 4 This is a schematic diagram of an embodiment of the optical lens provided by the present invention.

[0019] Explanation of icon numbers: 100. Smart head-mounted device; 1. Outer shell; 11. First receiving slot; 12. Second receiving slot; 2. Eye-tracking module; 21. Camera; 22. Light-emitting element; 31. First lens; 4. Optical lens; 41. First surface; 411. First central region; 412. First peripheral region; 42. Second surface; 421. Second central region; 422. Second peripheral region; 43. Central part; 44. Outer edge; 5. First protective cover; 200. Human eye.

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0024] In VR (Virtual Reality) glasses, to enhance the immersive experience, eye-tracking cameras and infrared light strips are typically added to the VR module. When worn, the light strip emits near-infrared light towards the user's eyes. The user's eyes reflect a portion of this light, which is then received by the camera to determine the position of the user's eyes. Based on the position of the user's eyes, the VR display is rendered in real time to improve the user experience.

[0025] However, existing eye-tracking modules are generally designed on the outside of the VR optical engine (near the eye), which increases the size of the VR system. Alternatively, the camera can be designed between the lens and the screen, and the light strip of the eye-tracking module can be placed on the outside of the VR system (near the eye). This solution has certain advantages in terms of size, but there is a problem that the camera can be seen by the user, and the placement of the camera is more important.

[0026] The inventors discovered that placing the eye-tracking module outside the optical engine module, outside the user's line of sight, would prevent the user from directly seeing the eye-tracking module, but this would undoubtedly increase the size of the VR system. Another existing solution, while reducing the size of the VR system by placing the camera between the lens and the display screen within the optical engine module, thus preventing the camera from occupying additional space outside the optical engine module, still places the camera within the user's line of sight. Visible light reflected from the camera back to the user's eye would then be directly visible to the user, affecting the user experience.

[0027] In view of this, the present invention proposes an intelligent head-mounted device 100, which aims to solve the problem of making the eye-tracking module 2 difficult for the user to see without increasing the size of the VR system.

[0028] Please see Figures 1 to 3 In one embodiment of the present invention, the smart head-mounted device 100 includes a housing 1, an eye-tracking module 2, and a lens assembly. The inner wall of the housing 1 has a first receiving groove 11 with a first opening and a second receiving groove 12 with a second opening. The eye-tracking module 2 includes a camera 21 and a light-emitting element 22. The light-emitting element 22 is used to emit infrared light. The camera 21 is disposed in the first receiving groove 11, and the light-emitting element 22 is disposed in the second receiving groove 12. The infrared light emitted by the light-emitting element 22 can be directed towards the human eye 200 through the second opening. The infrared light emitted by the light-emitting element 22 can be reflected by the human eye 200 and then directed towards the camera 21 through the first opening. The camera 21 can receive the infrared light reflected by the human eye 200. The lens assembly allows infrared light to pass through and also blocks visible light from passing through. The lens assembly covers the first opening and the second opening.

[0029] The technical solution of this invention utilizes the space inside the housing 1 by creating a first receiving groove 11 with a first opening and a second receiving groove 12 with a second opening on the inner wall of the housing 1. This allows the camera 21 of the eye-tracking module 2 to be placed in the first receiving groove 11, and the light-emitting element 22 of the eye-tracking module 2 to be placed in the second receiving groove 12. This fully utilizes the space inside the housing 1, improves the space utilization rate, and avoids the phenomenon of increased VR system size caused by placing the camera 21 and the light-emitting element 22 on the outside of the housing 1. The light-emitting element 22 emits infrared light, which is reflected by the human eye 200 and then directed towards the camera 21, where it is received. The invention also incorporates a lens assembly. The lens assembly covers the first and second openings, and while it allows infrared light to pass through, it blocks visible light. This ensures that the light emitted from the light-emitting element 22 can pass smoothly through the lens assembly and reach the human eye 200, and that the camera 21 can successfully receive the infrared light reflected from the human eye 200, thus guaranteeing the normal operation of the eye-tracking module 2. Furthermore, because the lens assembly blocks visible light, visible light cannot pass through it to reach the camera 21 and the light-emitting element 22, nor can it be reflected after reaching the camera 21 and the light-emitting element 22 to reach the human eye 200 and be seen by it. Therefore, by adding the lens assembly, the eye-tracking module 2 is prevented from being seen by the user, improving the user experience. It should be noted that the smart head-mounted device 100 can be VR glasses, AR (Augmented Reality) glasses, MR (Mixed Reality) glasses, or XR (Extended Reality) glasses; no restrictions are imposed here.

[0030] Please see Figure 2 and Figure 3 In one embodiment, the lens assembly includes a first lens 31 and a second lens. The first lens 31 seals and covers a first opening, and the second lens seals and covers a second opening. By covering the first opening with the first lens 31, it ensures that infrared light reflected from the human eye 200 can pass smoothly through the first opening and be received by the camera 21. On the other hand, it prevents visible light from entering the first receiving groove 11 from outside through the first opening, ensuring that the camera 21 is not visible to the human eye 200. By sealing the first opening with the first lens 31, the airtightness and cleanliness of the camera are ensured. Similarly, by covering the second opening with the second lens, it ensures that infrared light emitted from the light-emitting element 22 can pass smoothly through the second opening and reach the human eye 200. On the other hand, it prevents visible light from entering the second receiving groove 12 from outside through the second opening, ensuring that the light-emitting element 22 is not visible to the human eye 200. By sealing the second opening with the second lens, the airtightness and cleanliness of the optical engine are ensured.

[0031] In one embodiment, the lens assembly further includes a first adhesive layer. The first adhesive layer is disposed on the periphery of the first lens 31, and the side of the first adhesive layer away from the first lens 31 is connected to the housing 1. By disposing of the first adhesive layer on the periphery of the first lens 31, the first adhesive layer can be bonded to the structure of the housing 1 at the first opening, thereby fixing the first lens 31. The fixed first lens 31 not only covers the first opening, but also seals the first opening in conjunction with the first adhesive layer, making the first receiving cavity a sealed cavity.

[0032] In one embodiment, the lens assembly further includes a second adhesive layer. The second adhesive layer is disposed on the outer side of the second lens, and the side of the second adhesive layer away from the second lens is connected to the housing 1. By disposing of the second adhesive layer around the second lens, the second adhesive layer can be bonded to the structure of the housing 1 at the second opening, thereby fixing the second lens. The fixed second lens not only covers the second opening but also, in conjunction with the second adhesive layer, seals the second opening, making the second receiving cavity a sealed cavity.

[0033] In one embodiment, the first lens 31 is embedded in the first opening; the first lens 31 and the camera 21 can be placed in the mold by injection molding process. Through injection molding process, the first lens 31, the camera 21 and the housing 1 after injection molding become a whole, so that the first lens 31 is embedded in the first opening, thereby enabling the first lens 31 to cover and seal the first opening, so that the first receiving cavity becomes a sealed cavity.

[0034] In one embodiment, the second lens is embedded in the second opening. The second lens and the light-emitting element 22 can be placed in a mold by injection molding. Through injection molding, the second lens, the light-emitting element 22 and the outer shell 1 become a whole after injection molding, so that the second lens can be embedded in the second opening, thereby enabling the second lens to cover and seal the second opening, making the second receiving cavity a sealed cavity.

[0035] In one embodiment, the wavelength range of light that the first lens 31 and the second lens can transmit is 800nm-850nm. Since the wavelength range of visible light is 380nm-780nm, and the wavelength range of light that the first lens 31 and the second lens can transmit is 800nm-850nm, visible light cannot pass through the first lens 31 and the second lens, thus preventing the light-emitting element 22 and the camera 21 from being seen.

[0036] In one embodiment, the light-emitting element 22 is a side-emitting element, with its light-emitting side facing the human eye 200. If the light-emitting element 22 were a front-emitting element, the infrared light emitted by it would need to be reflected multiple times from the inner wall of the housing 1 before reaching the human eye 200. This reflection would cause the light intensity to decrease, resulting in a reduction in the intensity of the infrared light received by the camera 21 and affecting the accuracy of detection. In this embodiment, the light-emitting element 22 is a side-emitting element, allowing its light-emitting side to face the human eye 200. The light emitted by the element 22 can then reach the human eye 200 with a stronger intensity, thereby increasing the light intensity received by the camera 21 and improving the accuracy of detection. The light-emitting element 22 can be a light-emitting strip or other infrared light emitter, and there are no limitations on its application.

[0037] Please see Figure 2 and Figure 4 In one embodiment, the smart head-mounted device 100 further includes an optical lens 4, which is disposed within the housing 1. The optical lens 4 is located at the end of the housing 1 away from the screen, and the eye-tracking module 2 is located on the side of the optical lens 4 away from the human eye 200. The optical lens 4 includes a first surface 41 and a second surface 42 arranged opposite to each other. The first surface 41 is concave, and the second surface 42 is convex. The optical lens 4 is a concave-convex lens, meaning that the radii of curvature of both the first surface 41 and the second surface 42 are less than zero. The ratio of the radii of curvature of the first surface 41 to the radii of curvature of the second surface 42 is 'a', which is 0.7 ≤ a ≤ 1.3. Since the radii of curvature of the first surface 41 and the second surface 42 are approximately close, the smaller the refraction of light by the optical lens 4, the easier it is for the camera 21 to receive the infrared light reflected from the human eye 200, thus allowing the camera 21 to have more placement angles. The radius of curvature refers to the reciprocal of the curvature at a point on a curve.

[0038] In one embodiment, the thickness ratio of the optical lens 4 is defined as b, then b < 2; by making the thickness of the optical lens 4 as uniform as possible, the optical lens 4 refracts light less, and the camera 21 can more easily receive the infrared light reflected by the human eye 200, thereby allowing the camera 21 to have more placement angles. Here, the thickness ratio refers to the ratio of the thickness at the thickest position to the thickness at the thinnest position.

[0039] In one embodiment, the optical lens 4 includes a central portion 43 and an outer edge portion 44 surrounding the central portion 43. The distance from the inner ring of the outer edge portion 44 to the outer edge of the outer edge portion 44 along the radial direction of the optical lens 4 is one-third of the radius of the optical lens 4. The thickness ratio of the outer edge portion 44 is defined as c, then c < 1.5. By making the thickness of the outer edge portion 44 of the optical lens 4 as uniform as possible, the refraction of light by the outer edge portion 44 is smaller, and the camera 21 can more easily receive the infrared light reflected by the human eye 200, thereby allowing the camera 21 to have more placement angles.

[0040] In one embodiment, the first surface 41 includes a first central region 411 and a first peripheral region 412 surrounding the first central region 411. The arc length from the center of the first surface 41 to the inner circle of the first peripheral region 412 on a plane passing through the axis of the optical lens 4 is defined as d1, and the arc length from the center of the first surface 41 to the edge of the first surface 41 on a plane passing through the axis of the optical lens 4 is defined as d2. Therefore, d1 = d2 * 2 / 3, and the difference between the maximum and minimum slopes of the first peripheral region 412 is d3. The second surface... 42 includes a second central region 421 and a second peripheral region 422 surrounding the second central region 421. The arc length from the center of the second surface 42 on the plane passing through the axis of the optical lens 4 to the inner circle of the second peripheral region 422 is defined as e1. The arc length from the center of the second surface 42 on the plane passing through the axis of the optical lens 4 to the edge of the second surface 42 is defined as e2. Therefore, e1 = e2 * 2 / 3. The difference between the maximum and minimum slopes of the second peripheral region 422 is e3, and |d3 - e3| < 0.4. By controlling the absolute value of the difference between d3 and e3 to be less than 0.4, the parallelism of the first surface 41 and the second surface 42 is ensured, thereby reducing the refraction of infrared light reflected from the eye by the first lens 31, and thus enabling the camera 21 to obtain better image quality. It should be noted that the difference between the maximum and minimum slopes refers to the difference between the absolute values ​​of the maximum and minimum slopes. Slope refers to the degree of inclination of the tangent line of the curve at that point.

[0041] Please see Figure 1 and Figure 2 According to one embodiment of the present invention, the lens of the camera 21 is tilted relative to the axis of the housing 1, so that the lens of the camera 21 is positioned closer to the human eye 200 than the end of the camera 21 that is furthest from the lens, thereby enabling the camera 21 to more easily receive infrared light reflected from the human eye 200.

[0042] Please see Figure 1 and Figure 2In one embodiment, there are multiple cameras 21, which are arranged at intervals along the circumference of the housing 1. The number of first receiving slots 11 is the same as the number of cameras 21 and they are arranged in a one-to-one correspondence. By setting multiple cameras 21, the infrared light reflected by the human eye 200 can be received better, thereby improving the accuracy of detection.

[0043] In one embodiment, there are multiple light-emitting elements 22, which are spaced apart circumferentially along the outer casing 1. The number of second receiving slots 12 is the same as the number of light-emitting elements 22, and they are arranged in a one-to-one correspondence. By setting multiple light-emitting elements 22, the light emitted by the light-emitting elements 22 can be more easily received by the camera 21, thereby improving the detection accuracy.

[0044] In one embodiment, the eye-tracking module 2 is located at the end of the housing 1 closest to the human eye 200. By placing the eye-tracking module 2 on the side of the housing 1 closest to the human eye 200, the light emitted from the light-emitting element 22 can be received by the camera 21 more quickly, and the eye-tracking module 2 is less likely to enter the visual range of the human eye 200.

[0045] In one embodiment, an infrared reflective film is provided on the inner wall of the housing 1. The infrared reflective film can reflect the infrared light reflected by the human eye 200 toward the camera 21. By providing an infrared reflective film on the inner wall of the housing 1, the infrared light reflected by the human eye 200 can be reflected by the infrared reflective film and then directed toward the camera 21. This allows the camera 21 to receive not only the infrared light directly reflected by the human eye 200, but also the infrared light reflected by the human eye 200 onto the infrared reflective film and then reflected back to the camera 21, thereby improving the accuracy of detection.

[0046] Please see Figure 1 and Figure 2 In one embodiment, the outer wall of the housing 1 is provided with a first inlet and outlet that communicates with the first receiving groove 11. The smart head-mounted device 100 also includes a first protective cover 5, which is disposed on the outside of the housing 1 and detachably connected to the housing 1, so that the first protective cover 5 can cover or expose the first inlet and outlet. By providing the first inlet and outlet that communicates with the first receiving groove 11, the camera 21 can be quickly replaced through the first inlet and outlet when it needs to be replaced, so as to maintain the camera 21. The first protective cover 5 can cover the first inlet and outlet after replacement, thereby preventing foreign objects from entering the first receiving groove 11 and affecting the normal operation of the camera 21.

[0047] In one embodiment, the outer wall of the outer casing 1 is further provided with a second inlet / outlet communicating with the second receiving groove 12. The smart head-mounted device 100 also includes a second protective cover, which is disposed on the outside of the outer casing 1 and detachably connected to the outer casing 1, so that the second protective cover can cover or expose the second inlet / outlet. By providing the second inlet / outlet communicating with the second receiving groove 12, when the light-emitting element 22 needs to be replaced, it can be quickly replaced through the second inlet / outlet for maintenance of the light-emitting element 22; wherein the second protective cover can cover the second inlet / outlet after replacement, thereby preventing foreign objects from entering the second receiving groove 12 and affecting the normal operation of the light-emitting element 22.

[0048] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A smart head-mounted device, characterized in that, include: The outer casing has a first receiving groove with a first opening and a second receiving groove with a second opening on its inner wall; An eye-tracking module includes a camera and a light-emitting element. The light-emitting element emits infrared light. The camera is disposed in a first receiving slot, and the light-emitting element is disposed in a second receiving slot. The infrared light emitted by the light-emitting element can be directed toward the human eye through a second opening. The infrared light emitted by the light-emitting element can be reflected by the human eye and then directed to the camera through the first opening; the camera can receive the infrared light reflected by the human eye. A lens assembly that allows infrared light to pass through and blocks visible light from passing through, the lens assembly covering the first opening and the second opening.

2. The smart head-mounted device as described in claim 1, characterized in that, The lens assembly includes a first lens and a second lens, wherein the first lens seals and covers the first opening, and the second lens seals and covers the second opening.

3. The smart head-mounted device as described in claim 2, characterized in that, The lens assembly further includes a first adhesive layer, which is disposed around the periphery of the first lens, and the side of the first adhesive layer away from the first lens is connected to the housing. And / or, the lens assembly further includes a second adhesive layer, which is disposed on the outer side of the second lens, and the side of the second adhesive layer away from the second lens is connected to the housing.

4. The smart head-mounted device as described in claim 2, characterized in that, The first lens is embedded in the first opening; And / or, the second lens is embedded in the second opening.

5. The intelligent head-mounted device as described in claim 2, characterized in that, The wavelength range of light that can be transmitted by the first lens and the second lens is 800nm-850nm.

6. The smart head-mounted device as described in any one of claims 1 to 5, characterized in that, The light-emitting element is a side-emitting element, and the light-emitting side of the side-emitting element is oriented towards the human eye.

7. The smart head-mounted device as described in any one of claims 1 to 5, characterized in that, The smart head-mounted device also includes an optical lens, which is disposed inside the housing and located at the end of the housing away from the screen. The eye-tracking module is located on the side of the optical lens away from the human eye. The optical lens includes a first surface and a second surface arranged opposite to each other, wherein the first surface is concave and the second surface is convex. If we define the ratio of the radius of curvature of the first surface to the radius of curvature of the second surface as 'a', then 0.7 ≤ a ≤ 1.

3. And / or, if the thickness ratio of the optical lens is defined as b, then b < 2; And / or, the optical lens includes a central portion and an outer edge portion surrounding the central portion, wherein the distance from the inner ring of the outer edge portion to the outer edge portion along the radial direction of the optical lens is one-third of the radius of the optical lens; the thickness ratio of the outer edge portion is defined as c, then c < 1.

5.

8. The smart head-mounted device as described in claim 7, characterized in that, The first surface includes a first central region and a first peripheral region surrounding the first central region. The arc length from the center of the first surface to the inner circle of the first peripheral region on a plane passing through the axis of the optical lens is defined as d1, and the arc length from the center of the first surface to the edge of the first surface on a plane passing through the axis of the optical lens is defined as d2. Therefore, d1 = d2 * 2 / 3, and the difference between the maximum and minimum slopes of the first peripheral region is d3. The second surface includes a second central region and a second peripheral region surrounding the second central region. The arc length from the center of the second surface to the inner circle of the second peripheral region on a plane passing through the axis of the optical lens is defined as e1, and the arc length from the center of the second surface to the edge of the second surface on a plane passing through the axis of the optical lens is defined as e2. Therefore, e1 = e2 * 2 / 3, and the difference between the maximum and minimum slopes of the second peripheral region is e3. Furthermore, |d3 - e3| < 0.

4.

9. The smart head-mounted device as described in any one of claims 1 to 5, characterized in that, The number of cameras is multiple, and the multiple cameras are arranged at intervals along the circumference of the housing. The number of the first receiving slots is the same as the number of cameras and they are arranged in a one-to-one correspondence. And / or, the number of light-emitting elements is multiple, and the multiple light-emitting elements are arranged at intervals along the circumference of the outer shell, and the number of the second receiving slots is the same as the number of light-emitting elements and they are arranged in a one-to-one correspondence.

10. The smart head-mounted device as described in any one of claims 1 to 5, characterized in that, The eye-tracking module is located at the end of the outer casing closest to the human eye.

11. The smart head-mounted device as described in any one of claims 1 to 5, characterized in that, The inner wall of the housing is provided with an infrared reflective film, which can reflect infrared light reflected by the human eye back to the camera.

12. The smart head-mounted device as described in any one of claims 1 to 5, characterized in that, The outer wall of the outer shell is provided with a first inlet and outlet that communicates with the first receiving slot. The smart head-mounted device also includes a first protective cover, which is disposed on the outside of the outer shell and detachably connected to the outer shell, so that the first protective cover can cover or expose the first inlet and outlet. And / or, The outer wall of the housing is also provided with a second inlet and outlet that communicates with the second receiving slot. The smart head-mounted device also includes a second protective cover, which is disposed on the outside of the housing and detachably connected to the housing, so that the second protective cover can cover or expose the second inlet and outlet.

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